Airbus is set to take a decision to upgrade its A330 with engines provided by Rolls-Royce, setting the stage for a new phase in a battle for wide-body jet orders with Boeing’s 787 Dreamliner, Reuters has reported, citing people familiar with the matter. The people, asking not to be named, said the go-ahead with Rolls-Royce as sole supplier for a new version of the A330, offering up to 14-15% in fuel savings with the help of new wingtips, remains subject to Airbus Group board approval. The A330 first entered service 20 years ago and had been expected to be overtaken by a new generation of carbon-composite jets like the 787 Dreamliner, and soon the Airbus A350.